Han'guk Hwan'gyŏng Pogŏn Hakhoe chi; Korean journal of environmental health; Journal of environmental health sciences; 한국환경보건학회지
The range of reduction rates of airborne bacteria concentration at 6 hrs, 12 hrs, 24 hrs and 48 hrs, which means a storage time until input of agar media into incubator after air sampling with an impactor, were 15-20%, 25-40%, 35-50% and 55-70%, respectively, compared to initial concentration. Types of agar media and storage thermal condition did not significantly affect a collection efficiency of impactor in terms of evaluating airborne bacteria level (p＞0.05). To better improve the impactor’s collection efficiency of airborne bacteria, based on the result of this study, it is recommended that the vicinity of 25℃ should be sustained until input of agar media into incubator after air sampling.
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